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1454results about How to "Precise cutting" patented technology

Two-dimensional ultrasound phased array transducer

A two-dimensional ultrasound phased array transducer includes an acoustic backing, a first circuit, which may be a flexible circuit disposed over the acoustic backing or a ground plane, an acoustically absorptive interface layer disposed over the flexible circuit, and a piezoelectric layer disposed over the interface layer. A matching layer may be disposed over the piezoelectric layer, and a second circuit, which may be a ground plane or a flexible circuit, may be disposed over the matching layer. The piezoelectric layer and the matching layer are diced by forming kerfs extending through these layers and at least partially into the interface layer. Extending the kerfs into the interface layer reduces cross-talk between elements, electrically isolates the elements, and facilitates manufacturing by reducing the precision required in controlling the depth of the cut. The acoustically absorptive interface layer may have acoustic properties similar to the backing material and may be formed of the same material as the backing material. Electrical interconnection between the piezoelectric elements and the first circuit is provided through the interface layer. The electrical connection may be formed by laser drilled vias in the interface layer, coated with gold or another suitable material.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Buffy coat tube and float system and method

A tube and float system for use in separation and axial expansion of the buffy coat is provided. The system includes a transparent, or semi-transparent, flexible sample tube and a rigid separator float having a specific gravity intermediate that of red blood cells and plasma. The sample tube has an elongated sidewall having a first cross-sectional inner diameter. The float consists of a main body portion and one or more support members protruding from the main body portion to engage and support the sidewall of the sample tube. The main body portion and the support members of the float have a cross-sectional diameter less than that of the first cross-sectional inner diameter of the tube when the sample tube is expanded, such as by centrifugation. The main body portion of the float together with an axially aligned portion of the sidewall define an annular volume therebetween. The support members protruding from the main body portion of the float traverse said annular volume to produce one or more analysis areas. During centrifugation, the centrifugal force enlarges the diameter of the tube to permit density-based axial movement of the float in the tube. Thereafter, the centrifugal force is reduced to cause the tube sidewall to return to its first diameter, thereby capturing the float and trapping the buffy coat constituents in the analysis area. The buffy coat constituents can then be evaluated or measured.
Owner:BATTELLE MEMORIAL INST
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